TDI190

There is no residue around the cap on the header tank. The dealer has performed three inspections. On top of that two more inspections have been done at other workshops. The dealer has consistently refused to discuss inspection methods with me.

So if I understand you correctly this by itself is actually a malfunction in the system?

I just checked the dealers website, and the person saying this is actually the workshop manager.

It was a mechanic. Supposedly a qualified and experienced one as well. I am baffled that they would make a statement like this.

Yesterday the dealer told me that it is perfectly normal that the car consumes some amount of coolant. The explanation was that it gets so hot in the EGR valve and DPF that coolant is consumed. However, on follow up question from me, they couldn't explain this process at all. Also when I mentioned that my friends Superb (exact same MY and specifications) had not used any coolant whatsoever even though it is driven under the same conditions and has more miles. The dealer said that different cars can be different and have different software coding etc. and that also was perfectly normal. To me all of this sounds like complete nonsense. Does any of the above dealer statements have any validity in the real world? I double checked the owners manual, and no surprise, it does not mention anywhere that consumption of coolant is normal. However it does mention specifically "Loss of coolant indicates cooling system leakage - risk for engine damage"

Unfortunately the dealer just isn't interested in performing a more thorough inspection.

I have a MY2018 190TDI L&K 4x4 Mk3 Superb that has a mysterious coolant loss. I need the help from the forum to figure out any potential cause of the coolant loss. For the fourth time in almost three years the expansion tank has dried up. Each time this happened I sent the car to the dealer, and each time they couldn't find the cause. The dealer has pressure tested the system every time and visually checked for leaks and not found anything. They just refilled the expansion tank and returned the car to me. The car has about 55' km now and and the factory warranty is about to expire. Between each fillup I have monitored the level in the expansion tank and it is quite obvious that the level drops steadily (but slowly) over time. I tried to search the forum but could only find threads pointing towards for example the water pump. If the water pump is the culprit there should be visible signs, shouldn't it? I talked to a independent Skoda mechanic today and he mentioned that he had seen several cars with coolant leak from the EGR valve. Wherever the leak is located it is a quite slow leak. Hence it is no surprise that it cannot be detected by pressurizing the coolant system at the dealer. What are your ideas? Has anyone experienced the same?